1 // SPDX-License-Identifier: GPL-2.0-only
3  *  Copyright (C) 1995-2000  Linus Torvalds & author (see below)
7  *  HT-6560B EIDE-controller support
9  *  Use hdparm utility to enable PIO mode support.
11  *  Author:    Mikko Ala-Fossi            <maf@iki.fi>
35  * The special i/o-port that HT-6560B uses to configuration:
40  * The special i/o-port that HT-6560A uses to configuration:
43  *    bit2 (0x04): "0" enables multi-master system	      (?)
48 static inline u8 HT_CONFIG(ide_drive_t *drive)  in HT_CONFIG()  argument
50 	return ((unsigned long)ide_get_drivedata(drive) & 0xff00) >> 8;  in HT_CONFIG()
54  * FIFO + PREFETCH (both a/b-model)
75  * gives.   [see cmd640.c for an extreme example of this. -ml]
95  * Active Time for each drive. Smaller value gives higher speed.
98 static inline u8 HT_TIMING(ide_drive_t *drive)  in HT_TIMING()  argument
100 	return (unsigned long)ide_get_drivedata(drive) & 0x00ff;  in HT_TIMING()
107  * on the F.G.I./Holtek HT-6560B VLB IDE interface.
108  * The HT-6560B can only enable one IDE port at a time, and requires a
113  * This routine is invoked from ide.c to prepare for access to a given drive.
115 static void ht6560b_dev_select(ide_drive_t *drive)  in ht6560b_dev_select()  argument
117 	ide_hwif_t *hwif = drive->hwif;  in ht6560b_dev_select()
125 	select = HT_CONFIG(drive);  in ht6560b_dev_select()
126 	timing = HT_TIMING(drive);  in ht6560b_dev_select()
132 	if (drive->media != ide_disk ||  in ht6560b_dev_select()
133 	    (drive->dev_flags & IDE_DFLAG_PRESENT) == 0)  in ht6560b_dev_select()
145 		 * Set timing for this drive:  in ht6560b_dev_select()
147 		outb(timing, hwif->io_ports.device_addr);  in ht6560b_dev_select()
148 		(void)inb(hwif->io_ports.status_addr);  in ht6560b_dev_select()
151 			drive->name, select, timing);  in ht6560b_dev_select()
156 	outb(drive->select | ATA_DEVICE_OBS, hwif->io_ports.device_addr);  in ht6560b_dev_select()
171 	for (i=3;i>0;i--) {  in try_to_init_ht6560b()
200 static u8 ht_pio2timings(ide_drive_t *drive, const u8 pio)  in ht_pio2timings()  argument
210 		cycle_time = ide_pio_cycle_time(drive, pio);  in ht_pio2timings()
217 		active_time = t->active;  in ht_pio2timings()
218 		recovery_time = cycle_time - active_time - t->setup;  in ht_pio2timings()
233 …printk("ht6560b: drive %s setting pio=%d recovery=%d (%dns) active=%d (%dns)\n", drive->name, pio,…  in ht_pio2timings()
240 		printk("ht6560b: drive %s setting pio=0\n", drive->name);  in ht_pio2timings()
250  *  Enable/Disable so called prefetch mode
252 static void ht_set_prefetch(ide_drive_t *drive, u8 state)  in ht_set_prefetch()  argument
259 	config = (unsigned long)ide_get_drivedata(drive);  in ht_set_prefetch()
262 	 *  Prefetch mode and unmask irq seems to conflict  in ht_set_prefetch()
265 		config |= t;   /* enable prefetch mode */  in ht_set_prefetch()
266 		drive->dev_flags |= IDE_DFLAG_NO_UNMASK;  in ht_set_prefetch()
267 		drive->dev_flags &= ~IDE_DFLAG_UNMASK;  in ht_set_prefetch()
269 		config &= ~t;  /* disable prefetch mode */  in ht_set_prefetch()
270 		drive->dev_flags &= ~IDE_DFLAG_NO_UNMASK;  in ht_set_prefetch()
273 	ide_set_drivedata(drive, (void *)config);  in ht_set_prefetch()
278 	printk("ht6560b: drive %s prefetch mode %sabled\n", drive->name, (state ? "en" : "dis"));  in ht_set_prefetch()
282 static void ht6560b_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)  in ht6560b_set_pio_mode()  argument
285 	const u8 pio = drive->pio_mode - XFER_PIO_0;  in ht6560b_set_pio_mode()
291 		ht_set_prefetch(drive, pio & 1);  in ht6560b_set_pio_mode()
295 	timing = ht_pio2timings(drive, pio);  in ht6560b_set_pio_mode()
298 	config = (unsigned long)ide_get_drivedata(drive);  in ht6560b_set_pio_mode()
301 	ide_set_drivedata(drive, (void *)config);  in ht6560b_set_pio_mode()
305 	printk("ht6560b: drive %s tuned to pio mode %#x timing=%#x\n", drive->name, pio, timing);  in ht6560b_set_pio_mode()
309 static void __init ht6560b_init_dev(ide_drive_t *drive)  in ht6560b_init_dev()  argument
311 	ide_hwif_t *hwif = drive->hwif;  in ht6560b_init_dev()
315 	if (hwif->channel)  in ht6560b_init_dev()
318 	ide_set_drivedata(drive, (void *)t);  in ht6560b_init_dev()
359 		return -ENODEV;  in ht6560b_init()
364 		return -ENODEV;  in ht6560b_init()
376 	return -ENODEV;  in ht6560b_init()
382 MODULE_DESCRIPTION("HT-6560B EIDE-controller support");